Here's why:
* Processing: The Golgi apparatus modifies proteins and lipids that are synthesized in the endoplasmic reticulum (ER). This includes adding sugars, folding proteins into their correct shape, and sorting them for their final destination.
* Packaging: The Golgi apparatus packages these processed molecules into vesicles, which are small membrane-bound sacs. These vesicles act as transport containers for the molecules.
* Export: The vesicles carrying the packaged products bud off from the Golgi and travel to the cell membrane, where they fuse with the membrane and release their contents outside the cell.
So, the Golgi apparatus acts like a cellular factory, taking raw materials from the ER, processing and packaging them, and then shipping them out to their final destination.